The eyes...

"The eyes can distract the mind very quickly and cause it in a flash to slip into the place of sin. The eyes look upon something passionately; they fondly dwell upon the idol of beauty; in an instant it is impressed upon the mind; the soul is pleased by the sight of the idol; the mind transmits it appetite and desire to the heart, and the sin is committed without a witness, according to St. Basil. This then is what the Lord meant when He said: 'whoever looks at a woman to lust for her has already committed adultery with her in his heart' (Mt 5:28). This is why Solomon reminded us: 'Do not lust after her beauty in your heart, Nor let her allure you with her eyelids' (Prov. 6:25)."

St. Nicodemos of the Holy Mountain